IPA Cleaning Pen is specially used to clean Thermal Printer Printhead. With a rigid but smooth pen head, it can remove oxide residue from printhead without scratching it. Over Pre-saturated Foam Swabs, IPA Cleaning Pens can be used for more than 10 times, it is a cost-effective solution to clean all thermal print head. Please note that after one use, you can scratch the pen head on a clean white paper to remove dirt on the pen head, so you can reuse it next time. Once the pen head is too dirty to reuse, Mediclean offer extra pen heads for your alternative.